Feed mechanism.



P. W. HANSON.

30, i9? il Patented May w we hw. Ps m I i r df w i E, if?, W HNSN FEE/n MCHAMSM.

APWCATSN .ULEB JULYO, i914. 1,184.850. Patented May 30, 1916.

' 3 SHEETS-SHEET 3.

All ma,

oFFICE.

BENGT M. W. HANSON, 0F HARTFORD. CONNECTICUT, ASSIGNOR T0 PRATT & WHITNEY COMPANY, 0F HARTFCRD, CONNECTICUT', CORPGRTION OF NEW' JERSEY.

` 'FEED MECHANISM.

Specification of Letters Patent.

Application led July 1G, 1914. Serial No. 850,253.

To all whom it may concern Be it known that I, BENGT M. TV. HAN- soN, n citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new und useful Improvements in Feed Mechanism, of which the following a specification.

This invention which relates to feed niecl'r anism is especially adapted to that type of metal-working machine in which i. work supportor carri-.ige und u tool for operating upon the work :are mounted for mov ent with resoect to euch other u1 )u :i suitable frame, which usually compri,.-. .i hed and column rising therefrom. The character or" such relative movement between the work carriage and tool, varies :according to the character of the worli'" to he donc. For in stance, in one euse the wort; carriage may he reciprocated to cause the worl-r to travel n path intersected by' u. reducing tool. In urp other euse, due to. the extent oi' the work, it may not he nec Axssury to reciprocate the woz-l: carriuge. yIn both euses, howwer it is de siruble to impart to the reducing-tool un advance movement or feed. In the first esse, this feed is advantageously derived from the moving work carriage und trunslcrred through suitable mechanism to said reducing tool. Vihen conditions require that the Work carriage be held in a lixed relation, as

in the second case mentioned, the mecha-f nism associated with the Work carriage for imparting feed .movement to the reducing tool, will obviously, be rendered inoperative. For this reason it became necessary to dcvise other means to accomplish the required feed. Hereiofsiire the toolafeed, under the conditions of this second onse, has been manually eiflected, but this practice could not always he depended upon to give the uniform feed necessary to produce work of required accuracy.

Willst may be termed power operated au iliary mechanism was found to fulfil the requirement-s in u very satisiisctory manner Aand the object of my invention is the loro Vision of such mechanism, simply and effec tively constructed.

In the drawings accompanying and form ing part of the present specicotion I have shown in detail one convenient form of emhodiment of my invention, which to enable those skilled in the art to' practise the will he set forth fully in the following description. Itis distinctly to be understood however, that I do not limit myself to this disclosure as I may depart therefrom in several respects within the scope of the invention defined by the claims following said def scription. v

Referring to said drawings: Figure 1 is a transverse sectional view of a. metal-working machine involving my invention, certain parts being shown in elevation. vtrout view of part of the bed of said machine showing e. work carriage mounted ehcreon und certain elements of u feed-mechanism. Fig. 3 is a detail sectional view online 3-3 of. Fig. 2 looking in the direction of the arrow, and, Fig. 4 is a horizontal sectionui view of feed-mechanism shown in Fig.

Lilie characters designate similar parts throughout the several views, which, it will ne observed, ure drawn to different scales.

The machine illustrated in the drawings is comu `nly .known as n. grinding machine. its hed or designated by 2 and'supported thereby upon suitable ways, is the work carriage or tuble as 3. Rising from the bed 2 is is movnhly mounted the head 6 carrying the rotary tool spindle '7 coupled with the usual grinding-\vheel or tool 8. Any suitable means (not shown) may be provided for driving said tool spindle ut a, proper speed.

As hereinbefore intimated, in performing u grinding operation on some work, for instance work of small extent-such as could be held on i. chuck as 9 (see Fig. l) reciprocation of the table 3 may not be necessary. ln this event simply :t more or less gradual feed of the tool toward the work is all that required. ln other euses, however, as was also previcuisly mentioned, the carriage 0r table 3 is rcciprocuted to pass the Work successively back and forth beneath the fiction Pathtd May 30, 1916. i

Fig. 2 is an column as 4 onA ways 5 of which At the end of the stub shaft 12 opposite the pinion 11 is rigidly mounted a bevel geez' 13 meshing with lnions 14 and 15, loosely mounted on a sha t.16, but held against longitudinal movement with "peet thereto. An extended hub of the ion i4 is prf vided with clutch teeth 17, while like hub on the rpinion 15 is provided with eluteh teeth 18. Between the Clutch faces of the oppositely disposed pinions 14 and 15 is a. clutch member 1.9, keyed to a sleeve 2O rigid with shaft 16. lfVhen said shaft 1G is rotated the clutch member 19 rotates there with and if the latter be shifted to engage teeth 17 on pinion 14, or teeth 18 on pinion 15, the work carriage 3, through gear lf3 shaft 12 and rack llwili be driven in one direction or the other as the. caso may be. the arrangement of gearing :hewn being Vcommon form of reversing mech nisrn.

Adjustably mounted on the oai rage 3 are the dogs 21 and 22, adapted to alternately engage the rocker 23, and intermittently swing it back and forth. ln the head of said rocker 23, is the spring backed plunger 25, pointed as at 26 to engage the similarly pointed end 27, of an arm 28 rigid with a rock-shaft 29. Also rigid with roel@ shaft 29 is an arm 30, which engages a groove 31, in the clutch member 19. As the rocker Fig. 2.) the point of plunger 25 will be cai`4 ried below the point of arm 27 and said rocker is swung to the right the point of plunger 25 willbe carried above' the point `of arm 27. It will be apparent then, that when the point of plunger 25 below the point of arm 28, the thrustof the former will cause rock-shaft 29 to swing to the lett and engage eluteh 19 to the left, while when the point of said; plunger 25 is above the point of arm 28 the thrust of said plunger will cause rock-shaft 29 to swing' to the right and engage clutch 19 to the right. It will be noted that power to more the point of plunger 25 from one side to the other oi* the point of arm'28 is derived from :novement of the carriage, but to insure throwing oi clutch 19 beyond a. neutral position. power of the vspring bach of plunger 25 is depended upon.

Following Athe action of the parts just deh scribed it will be Seen that as the dogs 2l and 22 alternately engage the rocker 23 and .swing it to the right and to the left respectively, thel carriage reversing mechanism will be correspondingly operated and the extent of movement of the'earriage will depend up"on the distance between said dogs 21 and 22, which as before stated are adjust ably mounted.

The shaft 16, hereinbet'ore described in connection with the clutch is driven through a gear 32 mounted thereon and meshing with a pinion 33 fast on the shirt",u

Lies

23 is swung to the left (as seen in ed to the latter shaft is a wormfluven by the worm 36 fast on lwhich may be driven'by a belt puney (not shown).

D' now to the feed, one form of advancing and retracting winding-wheel includes as elements a comparatively short l which is suitably mounted in nii-.g at the front of the machine. d with the column 4 and head G is .4 and lowering the latter are the di' 235.?, und pinion 40, said rack beine fasnefl to the column 4, and the pinion 2being El with a shaft 41 Carried by the`head 6 ling transversely thereof. Power g the shaft 41 .is transmitted from ou lh gearing and shafts as fol- 2, 43, 44, 4 5, shaft 4G, bevel vel gear 48,shaft 49, worm 50, `wheel 51.

nmunted on sleeve 521 surroundshaft, 238, is a. rocker 53, provided u nu e. pawl 54 adapted to engage the teeth nl 1; ratchet'wheel 55, said ratchet-wheel keyed to the shaft 3S. lt will be apt that when the roeke is swung tov le ot (see Fig. the ratchet-wheel 55, lli..` if the pawl 54 is in engagement theremoved a corresponding amount, this. movement will be transmitted shafts and reducing gearing ded. to the head (i. one side of the segmental flange g the rocker 53, is a pin or stud t link :37, slotted as at 58 to engage pivoted at its other end toan i. rigidly fastened to a shaft 60 which rigidly carries a pinion 6l meshing r iso ou o to the right (Fig. 2) the arm 59' through ribed parts will be swung to the indicated by dotted lines, such acng place as the carriage reaches the s travel to tle'right. In a similar t when the carriage reaches the end travel to the left, the dog 22 will ner 23 to the left and cause arm ne the position in which it ap- 1 ill lines. Each time the arni 59 nigh the are indicated, the link lvanced and retracted; 0n the adrement the rocker 53 is swung in wn to cause the pawl 54 to advance ,he i nwheel, while on the retraetive movement, due to the lost motion provided for between pin 56 and slot 58\the rocker 53 will swing back by gravity to its normal position. This normal position of the 1i iu governed by thestop screw 63, h is tapped into the` lug G4 on the ma- 'rameand provided with a jam nut vvn in Fig. 2, said stop screw 63 to permit of a full capacityV Aies stroke being given the pawl-rocker By varying the length of stroke of said rocker ley means of stop screw 63, the pawl may be made to advance the ratchet-wheel any desircd number of teeth Within its maximum limit of throw.

It will ne clearly apparent that a recip-A recatory movement of the carriage is essential to effect feeding of theratcheowheel through the agencyr of' the mechanism, thus ar described. Attention, however, has already been directe-d to the fact that for cersain work the carriage is not reciproeated, and under such conditions it is necessaryin providing for an automatic feed of the grinding-wheel to employ auxiliary mechanism. It was found to be practical and advantageous to interpose mechanism of this character between tine shaft and pawl-roeer 53 construction invelved in so doing will new be described, attention being first, again directed to the ,fart that vhen it is desired to eliminate the iwprocatery motion of the carriage. tne clutch member 19# is shifted to and maintained in neutral position.. necessitate sto ping the rotation of shaft "di shaft 34, and trom the latter is deL .f idin -Wheel when tile. carriage is staA 1 ,l P7 tiener?.

Fastei'ie ro en i oi'- sha't 3l, 'is a cam tra. active face which rn extending from ,i wref which is inlined a conmara,- tively short sliaift Till. To the other end et said "l, but loosely mounted on shaft 73, an arrn 72, the free end of the latter seing adapted to enc/ige a pin T3 on the wlcarrier In e head 74 at the end arm Tl, is incanta .f a siiiinggbaciied pin :lringboit 55, if the stem of which is to a position i? to force the pin nwardlgf er inte relation with arm 72, the latter being provided with Jie 78 to receive said pin. W'hcn by ans of the knob 76, the pin is with drawn from the position 1n which it is ,sliovn and given :i quarter turn, the small gin 79, extending transversely of the lockingbolt 75, will rest m the groove and iold saidxloekuigielt 1n unlocked relation.

-To accommodate the pin 'I9 when the lockng'bolt T is in Aioclringg reiaticn, the groove El is Anovided. This locked relation between or arms 7l. and T2 constitute in eect gid conncoticn between arm J2 rt 270.

*Jout midway of :its ler i i iyf-'ided *with a sprirc einen bears with a :vier

and

lever 72 82,

resistance This does not ,a the power to the feed of 'the l snaft 70, is finned arm '7l and adjacent' possible rocking of the latter will be pre-v vented by the thrust mentioned.

The simple action of the auxiliary feed mechanism just described is as follows:- The cam G6 rocks the arm 69, and this rocking motion is transmitted ythrough shaft 70 and arm 72 to the pani-carrier 53, so that the latter may be given the identical movement that it receives through the mechanism operated by the reciprocatory movement oi the worlecarriafe. Either mechanism for effecting the rocking movement of the pawlcarrier may operate without disconnecting or affecting in way the other. In other Words, when link 52 roc rs the paWl-cax rier, pin 73 is simply moved away from lever or arm "I2, and when lever 72- rocks the' pani-carrier, the stud 56 moves freely in the slot 5S.

vided ic-r this purpose a hand-wheel 86,

keyed to the extreme end of the shaft 38. "What i claim is:--

1. The combination of mechanism,

ratchet mechanism including a. pand-carrier associated theres-itin and separate devices' adapted to operate independentljfY to actua'te said pawllcarrer, either of said devices being operable while the other is also in operable' relation.

2. The combf ratchet ine-elia associated t'h, eatiny separate devices for ac tuatingtlie pawbcarriei', and separate, means associated with each of the devices whereby either may be made operative when the tion of feed meclianisn'a,

, other is inoperative.

3. The combination of feed mechanism, ratchet Vmechanism4 including av pawlcan rier associated therewith, separate devices adapted to operate independently to actuatesaid pawl-carrier, and controlling element means whereby any desired degree of movement o the pani-carrier may be. obtained from cit-lier of said devices. L The combination, of feed mechanism, ratchet 'mechanism including a pearl-carrier associated therewith, pins on tne parli-can rior, e siaiftabie-u'ilctted link in engagement m including a pawlcarriei;

with one of the pins. and an eseiiiatory arm in engagement iv", i e other pin: the relation between the siettef iinii and oscillatory arni and their we pins being such that either may epei iate the pawicarrier irrespective et il z The combine n er ii'ieehanisni, ratchet mechanism 'including a paWi-cni'iiffr associated therewitliT pi .niity ef devices for actuating the pawi--i nier, and separate means interposed between each nf the de vices :ind the pawieaiiier for actuating the latter.

F. The cemhiiiatien et feed mechanism.r ratchet mechanisml ineiuding a pawl-can iier associated therewith, and separate. cen existing devices indepcrfienty eperabe, whereby either nia;` t e said pawhcarrier 'irrespective u? the eti ,i

7. The eombinatien of feed mechanism, ratchet mechanism inciuding paWl-earrier associated therewifn7 and separate devices simultaneously engaging aid nawLeairier and adapted ter 'independently actuating the hitter.

8. The combination iii ratchet n'iechanisni iiieiudi; associated therewith, :Wm taneousiy adapted for inde; f7 actuating the latter, and a eentieiiiw eieinent wherehf,vv diii'erent degrees of inm'cnaen'r, of the panicarrier may he eht: 'ned from either 0i' said devices.

S). 1n a grinding niaishiae 'i combination` a werk support, a rei 'tiff tooi, means ter feeding the reducing;1 e und separate devices siinultanemisiy asslieiated with the feeding ineens fer independently actuating` the hitter.

10. In a grinding inziehine in combination, a werk support.y a reducing tool, means fiar feeding; the reducing teni, separated devices simuituneeusiy 'seiated with the feeding ineens for 4nieutly aetu'atinf the hitter. and a i di eieinent whci by different deg; ,surement of the feeding ineens mag in; nnineii freni eiiier of said devicess In zi giini tion, a. driving port, :i redueh f wel. reducing tool, n

vfeed mechanism, g a piiwl-car 1ier te devices simuli j 'iuwi-eairier and ne in eonihiniiv'iihie Work supfor feeding the i separate devices siniuitmAv t0 @per and tz-.e toet feediii ing ,f-:hat and the i 0f aiu the hitter i, iii Y aid driving rigid with the i, a seY ted thereiii i?g The comhiiiai.

ringe? mechanism tei driving shiiltt, meeh. ringe interposed betr-.x

combine tien (if feed niet ii d in it feed f driving sin t a i'(,\ckshei.` i aft and ein on said i' proper rehi ed arm and i i, aix my i hessen ding para; 

